(3.8 mm) above or below the locating hole on the index plate.
 (b)  Move the horizontal stabilizer until Dimension B on the stabilizer ballscrew actuator is 20.65 | 0.01 inches
 (524.5 | 0.3 mm).
 (c)  
Measure and write down the two of the elevator positions.

 (d)  
Do the steps that follow to calculate a dimension for the two elevators: 1) If the elevator was above the locating hole when dimension

 B was 15.89 inches (403.6 mm), add its distance to the distance of the elevator when dimension B was 20.65 inches
 (524.5 mm).
 2)  If the elevator was below the locating hole when dimension B was 15.89 inches (403.6 mm), subtract its distance from the distance of the elevator when dimension B was 20.65 inches (524.5 mm).
 (e) Make sure that the calculated dimension is 4.67 | 0.23 inches
 (118.6 | 5.8 mm).
 (f)  Move the horizontal stabilizer until Dimension B on the stabilizer ballscrew actuator is 25.09 | 0.01 inches
 (637.3 | 0.3 mm).
 (g)  
Measure and write down both elevator dimensions.

 (h)  
Do the steps that follow to calculate a dimension for both elevators: 1) If the elevator was above the locating hole when dimension

 B was 15.89 inches (403.6 mm), add its distance to the distance of the elevator when dimension B was
 25.09 inches (637.3 mm).
 2)  If the elevator was below the locating hole when dimension B was 15.89 inches (403.6 mm), subtract its distance from the distance of the elevator when dimension B was
 25.09 inches (637.3 mm).
 (i)  Make sure that the calculated dimension is 11.10 | 0.36 inches
 (281.9 | 9.1 mm).
 S 865-328
 (6)  
Keep auxiliary pitot systems No. 1 and 2 pressurized for the feel unit override test.

 S 865-329

 (7)  
Keep the left, right, and center hydraulic systems pressurized for the feel unit override test.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 O. Feel Unit Override Test
 S 865-327
 WARNING: KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL SURFACES WHEN
_______ HYDRAULIC POWER IS SUPPLIED. AILERONS, ELEVATORS, RUDDER, FLAPS, SLATS, SPOILERS, AND STABILIZER ARE FULLY POWERED SURFACES. INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN HYDRAULIC POWER IS SUPPPLIED.
 (1)  
Make sure that the left, right, and center hydraulic systems are pressurized (AMM 29-11-00/201).

 S 865-151

 (2)  
Move the horizontal stabilizer Dimension B on the stabilizer ballscrew actuator to 19.07 | 0.05 inches

 (484.4 | 1.3 mm) (4.0 units of trim on the position indicator).
 S 495-152
 (3)  Put a piece of tape on the side of the airplane adjacent to the elevator trailing edge.
 NOTE: Marks for the up and down positions of the elevator will be
____
 put on the tape.

 S 865-153
 (4)  Let the elevator go to its center position.
 NOTE: Use this as a start point to measure travel dimensions.
____
 S 865-269
 CAUTION: DO NOT LET THE PRESSURE GO ABOVE 4.75 PSI (32.8 KPA)
_______ (426 KNOTS). WILL PREVENT DAMAGE TO THE FEEL COMPUTER. MAKE PRESSURE CHANGES SUCH THAT THE INDICATED RATE OF CLIMB (OR DESCENT) IS LESS THAN 5000 FEET PER MINUTE FOR THE STATIC SYSTEM AND 300 KNOTS PER MINUTE FOR THE PITOT SYSTEM.
 (5) Pressurize auxiliary pitot systems No. 1 and 2 to between 4.45 and
 4.55 psig (30.68 and 31.37 kPa) (415 to 419 knots) (AMM 34-11-00/201).
 NOTE: Use airspeed values only when the static pressure on the
____ airspeed indicator is open to ambient pressure.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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 ALL  ú ú 10 Page 580P ú May 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 S 725-009
　
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